Professor Henry Graff of Columbia University Did Not Know Obama There

I don’t know. This statement beneath seems like it’s very important to me. I think it’s strange how I don’t see people talking about it more. What am I not understanding here?

[QUOTING]Graff said, “I taught at Columbia for 46 years. I taught every significant American politician that ever studied at Columbia. I know them all. I’m proud of them all. Between American History and Diplomatic History, one way or another, they all had to come through my classes. Not Obama. I never had a student with that name in any of my classes. I never met him, never saw him, never heard of him.”